| 摘要 |
PROBLEM TO BE SOLVED: To realize the construction of a large-scale floatable structural body by making a framework to an outer shape of floated structural body and placing concrete to the inner space of a formwork floated above water by using the water surface in the formwork as the bottom surface of the formwork. SOLUTION: A plurality of formwork floats are connected together laterally on the sea surface at an internal angle portion at a wharf and the formwork 2 framed to the outer block shape of the floated structure to be obtained is arranged. At the outer side of the formwork 2, many floats 3 are arranged and the whole of the formwork 2 is floated on the sea and retained and, at the inner side, reinforcing mesh 4 is tensed at the same interval in advance both in the longitudinal and lateral directions. Concrete 7 to be placed inside the formwork is lightweight concrete with the specific gravity of less than 1 and comprises the lightweight fine aggregates and coarse aggregates; when the concrete is placed, it spreads sequentially on the sea with the sea surface as the bottom of formwork and is turned into the shape of formwork 2, is cured, hardened and floated to sea surface thereby forming the foundation portion of the floated structural body. By utilizing the floating characteristics of the concrete floating on the water, this concrete can be placed directly on the water surface, so that the construction of a large-scale floated structure becomes possible.
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